Both are Korean injectable skin boosters. Both give glow. They work through different mechanisms and produce different results — the choice depends on your skin type, goals, and timeline. This is the honest comparison from a clinic that uses both routinely.
Rejuran for skin quality. Juvelook for collagen + structure.
Both are KFDA-approved injectable skin boosters used in Korean dermatology. Rejuran uses polynucleotides (salmon DNA fragments) to trigger regeneration — best for skin quality, hydration, and post-procedure healing. Juvelook combines polynucleotides with PLLA (poly-L-lactic acid) microspheres — adds collagen-stimulating structural support on top of the regenerative effect. Choose Rejuran if your goal is glow and skin quality; choose Juvelook if you want mild collagen-based volumizing alongside glow. Many JRYN patients use both — Rejuran first to establish skin quality, Juvelook 2–3 months later for added structure. Pricing differs ~20%; protocol structure is similar (3-session series spaced 2–4 weeks).
Polynucleotides from salmon DNA trigger cellular regeneration — fibroblast activity, collagen production, blood vessel formation. Skin from within, no added material structure. Pure regenerative mechanism.
Adds PLLA (poly-L-lactic acid) microspheres alongside polynucleotides. PLLA gradually dissolves over 6 months, stimulating sustained collagen formation around microsphere sites. Structural collagen building.
Both are micro-injection across face. Both 30-minute appointments. Juvelook may produce slightly more noticeable papule bumps initially due to microsphere component. Both fully resolve in 24–48 hours.
Rejuran: peaks 4–8 weeks post-final session, holds 6 months. Juvelook: peaks 8–12 weeks post-final session, holds 9–12 months due to PLLA-stimulated collagen. Juvelook builds slower but lasts longer.
Rejuran: redness, mild papule bumps for 24h, no rare side effects. Juvelook: redness, papule bumps slightly more pronounced for 48h, very rare nodule formation if injected too superficially (technique-dependent).
Rejuran: maintenance every 4–6 months. Juvelook: maintenance every 9–12 months (longer hold from PLLA collagen effect). Juvelook costs ~20% more per session but you maintain less often.
→ Rejuran. Lower cost, faster results, simpler protocol. The classic K-beauty glow injection.
→ Juvelook. Best for cheek/midface that lost mild volume. Builds collagen under the skin over 6 months.
→ Rejuran. Pure regenerative effect. Doesn't add material that complicates already-stressed skin.
→ Rejuran first, then Juvelook later. Establish hydration baseline with Rejuran's regenerative effect; add structural support with Juvelook 2–3 months later.
→ Juvelook is often a better long-term investment due to longer collagen-building window. Or sequential Rejuran → Juvelook.
→ Rejuran during healing window; Juvelook 6+ weeks after device-based treatments are fully recovered. Different timing, different roles.
Originated 2014. Strongest clinical data among polynucleotide injectables. Multiple variants (Healer, S, I) for different concerns. JRYN's default polynucleotide booster for new patients.
Korean-developed combination injectable. Polynucleotide + PLLA microspheres. KFDA-approved. Newer than Rejuran but with strong clinical evidence since 2021.
Healer (face general), S (acne scar focus), I (under-eye specific). Selected based on consultation findings rather than default pick. Different prices.
Standard Juvelook (face general) and Juvelook Volume (mild contour-focused, more PLLA content). Volume version costs more, used sparingly for specific midface volume concerns.
Mild redness, small papule bumps fully resolve within 24 hours. Ice pack as needed. Gentle skincare only. Same-day flight OK.
Slightly more pronounced papule bumps for 24–48 hours due to microsphere component. Ice pack, avoid massage of treatment areas. Same-day flight OK but visible bumps may need a day.
Strict SPF 50+ for 2 weeks. Newly stimulated skin is photosensitive regardless of which booster. Hat for first 5 days when possible.
Both compatible with normal skincare routine after first week. Avoid aggressive resurfacing (chemical peels, ablative laser) for 4 weeks post-injection. Mild treatments (HIFU, light laser) can resume after 2–3 weeks.
Dr. Lee Portrait
A medical decision should not feel rushed.
My job is to give you the 30 minutes you couldn't get at home
—
then deliver treatment that respects what made you fly here in the first place.
WhatsApp us your skin concerns and travel dates. We assess whether Rejuran, Juvelook, or sequential use of both fits your goals. No defaulting to whichever costs more — we recommend based on what your skin needs.
Individual results may vary. Content is for informational purposes only and is not a substitute for medical advice. Please consult a licensed medical professional before any procedure. Prices are estimates and may change. JRYN Dermatology is licensed under the Korean Medical Service Act.
Contact number : +82-10-3951-7576
Address:
4F, Samjeong Tower, 672 Jungang-daero, Busanjin-gu, Busan, Korea